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Be it known that I, R. H. ALEXANDER, of Plato, in the' countyrof Lorain, and State of Ohio, have invented certain new and useful Improvements in FlourJolts; and I do hereby .declare that-tliefollowing is afull, clear, and eicact description thereof, reference being had tothe accompanying drawings, making a partof this specification, in which Y Figure 1 is a. top view of the bolt mounted in its chest, showing the knockers held fast.

4Figure 2 is` asimilar view of the same parts, showing the-knocke'rs released,

Figure 3 is a vertical transverse section of lig. 1.

Figure14 is a. vertical transverse section'o` tig. 2.

Similar letters of reference indicate corresponding parts in the several gnres.

The main object of -this invention is to'shake or jar a flour-bolt during the operation of bolting our, by means of a number of 'sliding-weights or knockers which are applied to radial arms within the bolt, and provided with means which will enable a person to stop or release them at pleasure without stopping the motion of the bolt, as will be hereinafter described. v 4

Another object of my inventionris to construct the frame'of a Hour-bolt upon a central perforated cylinder," which forms the shat'tof the-bolt and also a means for conducting the our into the bolt and separating the coarser partclesfrom the ne Hour, as will be hereinafter described. l

To enable othersV skilled in the art to understand myinventio'n, VIrvvill describe its construction and operation.

In thc-accompanying drawings, A represents the chest within which. the bolt is arranged to vibrate. B is a hollow shaft, which'is )node of thin metal finely perforated, and which is provided on its' ends with'journals a a. The journal a is Vsolid, and is supported upon an elastic bearing, b, but the jourhal a is hollow, for. the purpose of allowing Hour to be introduced into theshaft through it. The hollow and .perforated shaft-B may -be made cylindrical, as shown in the drawings;A andnear that end which is furthest from the hollow journal'a holes of considerable size are made through the shaft, for the discharge of the coarse suhstancesiwhich have been 'separated from the flour before it issubjected to the tine cloth which `surrounds the bolt-frame. The boltframe consists of a number of ribs c c secured to -the ends of radial rods or arms d d, at equal distances from Athe airisof the shaft B, and parallel thereto. At the receiving end of'the roel-frame a head, C, is secured to the shaft B, to which head the ends of' the ribs 'c are secured. This head C not only strengthens the reel-frame,

but it also prevents the escapeof anything at this end, particularly specksf .or impurities. The arms d to which the parallel ribs c are secured are suitably secured to the hollow sieve-shaft B, and" they are all curved, as shown in figs. 3 and 4l,V for purpose which will be hereinafter described. Upon these arms CZ are placed loosely the sliding-'weights or kno'ckersg g, so that they will alternately strike the ribs c c aud the sieve-shaft t B when the b'olt is rotated. vThese weights fall vby their own gravity, and, in consequence of the afrms d being curved as shown in the drawings, they strike the arms at an angle approaching a. tangent to the circumference of the bolt. As these weights are raised above the horizontal plane of the shaft B they lfall towardthis shaft, and cs they descend below this plane they fall toward the ribs; thus the bolt-cloth-and sieve-shaft are both shaken by the blows ofthe knockers. There are three longitudinally-adjustable rods, thvh, appliedto' the circumference of' the shaft B in a direction with its length, the `ends of which rods are turned up, as showil at i, so as to be acted upon by the vibratingslever Gabetween the converging arms of which said ends pass as the bolt is turned.. This lever G is pivoted to the bolt-chest A, so as to extend over that end -ot` shoftB which isfurthest from` the hollowjourual, and its free end is secured -to a. rod, Gf, which projects through the bolt-chest, as shown in figs. 1 and 2;, The open lever G is used for enabling a person to adjust the rods i, and to cause the hooks j on these rods to catch over and hold the weights g in contact withthe shaft B when it is desired to have them cease their actioruupon the bolt; ,also to move the hoo-ks 'and release the weights when it is desired to have them operate. 'l'he converging arms of, lever G operate upon the upturned ends of rods upon the principle of earns, and more these rods either toward the head C or fromyit., as may be required,'with out stopping the rotation of the bolt. It is by the rotation of the bolt, bringing theeendsof rods z z in contact with the oblique arms ci'` lever G, that'lthese rods It, with their hooks, are moved. When' the rod G is drawn outward as far as possible, as shown in g. 2, the lever Gr will move the'hcoks j from their respective sets of knoekers g, and thus allow both sets to slide outward and inward freely; 4hut when arm G is pushed inward, as shown in tig. 1, the hooks i-andj will catch and hold their kn'ockers. The hooks t' andj are arranged in such relation to their respective knockers g that by partially withdrawing the rod G the knockers which were held fast bythe hooks z'z'will be released, while those which :tre near the opposite end of the holt will still be held hy'ther hooks This arrangement admits of only one set of knockers being used when desired. The lower edge of the rod G should be notched to receive-a projection on ythe chest A, and thus be held in the position desired'. The elastie bearing'for one end of the bolt-shaft B, above referred to, assists materially in shaking or jarring the bolt by allowing this'end of the shaft to vibrate.

I am a-u'are that MeKain's patent of December 24., 1861, shows a bolting-reel with a central perforated tube applied to it, but this tube does not constitute both a shaft and separator, as-in my construction. vI am also aware that a, central tube formed with journals -is common in connection with coiTee-roasters and grain-v dryers, but the function of such central tube'in such relation isdiiercnt from that in my construction of bolting-reel.

Having described my invention, what elaim as new, and desire to secure by Letters Patent, is-

1. Constructing a bolting-reel with a hollow perforated shaft, such shaft being furnished with a hollow, open-'end journal, allvsubstantially in the manner and for the'hupose described.

2. The construction of the lever G G Gr 'so that't will operate upon the sliding-hook rods h h' h and cause the hooks'z't' to either stop or free all `the knockersg g, or a portion of them, as may he desired, substantially as and for the purpose setforth.

R. H. ALEXANDER.

Witnesses:

A. T. JoIrNsoN, W. G. CRANE. 

